7120745 has 4 divisors (see below), whose sum is σ = 8544900. Its totient is φ = 5696592.

The previous prime is 7120741. The next prime is 7120781. The reversal of 7120745 is 5470217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5470217 = 113 ⋅48409.

It can be written as a sum of positive squares in 2 ways, for example, as 5550736 + 1570009 = 2356^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 7120745 - 2² = 7120741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7120741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712070 + ... + 712079.

It is an arithmetic number, because the mean of its divisors is an integer number (2136225).

Almost surely, 2^7120745 is an apocalyptic number.

It is an amenable number.

7120745 is a deficient number, since it is larger than the sum of its proper divisors (1424155).

7120745 is a wasteful number, since it uses less digits than its factorization.

7120745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424154.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 7120745 is about 2668.4724094508. The cubic root of 7120745 is about 192.3867439717.

The spelling of 7120745 in words is "seven million, one hundred twenty thousand, seven hundred forty-five".